Sharpener



FIG. 1 is a perspective view of the sharpener;

FIG. 2 is a front elevational view of the sharpener;

FIG. 3 is a rear elevational view of the sharpener;

FIG. 4 is a left side elevational view of the sharpener;

FIG. 5 is a right side elevational view of the sharpener;

FIG. 6 is a top plan view of the sharpener;

FIG. 7 is a bottom plan view of the sharpener;

FIG. 8 is a perspective view of the opened sharpener; and,

FIG. 9 is an exploded perspective view of the opened sharpener. 

CLAIM The ornamental design for a sharpener, as shown and described. 